Spherical phosphor, wavelength conversion-type photovoltaic cell sealing material, photovoltaic cell module, and production methods thereof
AssigneeHitachi Chemical Company, Ltd.
InventorsKaoru Okaniwa, Takeshi Yamashita, Taku Sawaki
Life of this patent
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Abstract
A spherical phosphor includes a fluorescent substance having a maximum excitation wavelength of 400 nm or longer; and a transparent material containing the fluorescent substance, in which, in an excitation spectrum, an excitation spectral intensity in a wavelength region of from 340 nm to 380 nm is 50% or higher of an excitation spectral intensity at a maximum excitation wavelength. A wavelength conversion-type photovoltaic cell sealing material includes a light-permeable resin composition layer that contains the spherical phosphor and a sealing resin.
Claims16
A spherical phosphor comprising:
- a fluorescent substance having a maximum excitation wavelength of 400 nm or longer;
- and
- a transparent material comprising the fluorescent substance,
- wherein, in an excitation spectrum, an excitation spectral intensity in a wavelength region of from 340 nm to 380 nm is 50% or higher of an excitation spectral intensity at a maximum excitation wavelength.
A method of producing a wavelength conversion-type photovoltaic cell sealing material, the method comprising:
- preparing a spherical phosphor, the spherical phosphor comprising a fluorescent substance having a maximum excitation wavelength of 400 nm or longer and a transparent material comprising the fluorescent substance, wherein, in an excitation spectrum, an excitation spectral intensity in a wavelength region of from 340 nm to 380 run is 50% or higher of an excitation spectral intensity at a maximum excitation wavelength;
- mixing or dispersing the spherical phosphor with or in a sealing resin to prepare a resin composition;
- and
- forming the resin composition into a sheet form to prepare a light-permeable resin composition layer.
A method of manufacturing a photovoltaic cell module, comprising:
- preparing a wavelength conversion-type photovoltaic cell sealing material comprising a light-permeable resin composition layer which comprises a spherical phosphor and. a sealing resin;
- the spherical phosphor comprising a fluorescent substance having a maximum excitation wavelength of 400 nm or longer and a transparent material comprising the fluorescent substance, wherein, in an excitation spectrum, an excitation spectral intensity in a wavelength region of from 340 nm to 380 nm is 50% or higher of an excitation spectral intensity at a maximum excitation wavelength;
- and
- disposing the wavelength conversion-type photovoltaic cell sealing material on a light receiving surface of a photovoltaic cell element.
Dependencies are inferred from the claim text.